Electro-magnetic car-brake



(No Mod-e1.) y

J. HERRINGTON.

ELECTRO MAGNETIC GAE BRAKE.

INVBIJTOR ATTOR EYS.

Patented Aug. 2, 1887.

UNITED STATES JACOB HERRlNGTON, OF SHARON, PENNSYLVANIA.

ELECTRO-MAGNETIC CAR-BRAKE.

SPECIFICATION forming part of Letters Application led March 30, 1887.

To all whom it may concern:

Beit known that I, JACOB HERRINGTON, of Sharon, in the county of' Mercer` and State of Pennsylvania, have invented a new and Improved Electro-Magnetic Car-Brake, of which the following is a speciiication, reference being had to the annexed drawings, forming a part thereof, in which- Figure l is a plan view of my improved electro-magnetic car-brake, and Fig. 2 is a side elevation of one of the car-trucks to which my improvement has been applied.

Similar letters of reference indicate correspending parts in both views.

The object of my invention is to provide a simple and efficient electro magnetic ear brake which may be operated from the locomotive or from one of the cars of the train; also, to provide means for maintaining the electric circuit in case of the separation of the cars of the train and for automatically establishing the circuit when the cars are coupled.

My invention consists in the combination, with brake-levers attached to the car-trucks, of an electro-magnet and armature and electrical conductors extending through the car; also, in the combination, with theconductors, of a series of automatic electric couplings, which establish connection between the eonductors of adj aeent cars when the ears are coupled, and which will automatically close the circuit between the wires of each car on the separation of the cars.

It also further consists in the combination, with the brake-magnets and electrical conductors connected therewith, of an electric genen ator preferably a dynamolocated on thelocomotive, and arranged to be driven by a motor taking steam from thelocomotive-boiler; also, in the con1bination,with theeonductors, of an auxiliary electric generator, preferably a dynamo placed on the last ear of the train and driven by connection with one of the ear-axles.

Upon each car A, and also upon the tender B, is located an electro-magnet, C,which is provided with an armature, D, (shown in Fig. 2,) mounted on alever, E, pivoted in the ear -truck, and connected with one of the brake-bars,F,by the link a. The connection with the other brake-bar, F, is Veffected through the connecting-rod b, pivoted to the lever E, the lever G,

Patent No. 367,627, lated August 2, 1887.

Serial No. 233,017. (No morleLl pivoted in thetrnck-frame, the connecting-rod c, pivoted to the said leverG, thelever H, also pivoted in the truck-frame, and thelink Leonnected with thc end ofthe lever and with the brake-bar F, so that whenever a current is sent through the magnet C the armature D is drawn forward with more or less force, dependingon the strength of the current, and the brake-bars F are drawn toward the earwheels, bringing the brakeshoes cinto contact with the periphery of the wheels.

The couplings by which the circuit is eempleted between the cars are provided with two pairs of buii'ers, ffg g. The buffers f f are connected with rods h, extending underneath the platform of the cars and pressed outward by springsz', abutting against the innerguides oft-herods 7L and engaging pinspassing through the said rods. Theinner ends of the rods h are provided with right-angled arms j, which extend horizontally towardthe center of the ear, and in the path of the arms j are arranged contact-points 7c. The buffers g g' are connected with rods h',which extend through guides attached to the car-platform and are pressed outward by springs i. The contact-points k are connected electrically with the innerguides of the rods 7L', and through the said guides with the wires Z, extending underneath the ears. The inner guides of the rods It are connected by wires m with the terminals of the electromagnet C in all of the cars, except the tender and last ear of the train.

Upon the locomotive is arranged a dynamoelectric machine, I, driven in any convenient manner by power generated by the steam of `the locomotive. One of the brushespt, of the dynamo is connected by a wire, o, with the magnet C,placed underthe tender. The other terminahp, of the dynamo is connected by a wire, q,with the arm of the switch r, and the contact-points of the said switch r is connected by a wire, Z', with the inner` guide of the rod h of the tender.

Upon the rear car of the train is placed a dynamo-electric machine, J,which is driven by means of a pulley, i, on one of the axles of the car, and by a belt, u, the armature-shaft of the dynamo being provided with a pulley, o, for

Vreceiving the said belt. The brush w of the dynamo J is connected with the electro-magnet C of the car carrying the dynamo by the wire o', and the brush fr of the dynamo is connected with the inner guide of the rod h ol" the rear car by the Wire Z2.

In the ordinary Working 'of my improved brake the circuit remains open until it is desiredto operate the brakes, when the switchlever r is placed on the contact-point s, thus closing the circuit and causing the magnet C to be energized by the current from the dyn amo I or the dynamo J, or both. Should the train separate, the portion without the engine would be stopped by the automatic application ofthe brakes. Vhen the cars separate, the arms j of the rods h are carried forward against the contact-points k, thus closing the circuit, and the dynamo J, being in motion,generates acnrrent which energizes the magnets on the detached portions of the train and applies the brakes. The portion of the train attached to the locomotive, by virtue of the closing of the circuit between the army' and contact-point k of lhe last car, is in condition for the application ofthe brakes by the turning of the switch a, bringing it into contact with the point s. In this case the brakes on the portion of the train attached to the locomotive will be applied by the current generated by the dynamo I on the engine or tender.

Having thus fully described my invention, I

claim as new and desire to secure by Letters Patent- 1i. In an electro-magnetic car-brake, the combination of the magnets C, carried by the cars of the train, the armatures I), systems of levers connecting the armatures with the brakebars, the dynamo-electric machine carried by the locomotive, and a dynamo-electric machine carried and driven by one of the cars of the train, substantially as described.

2. The electric couplings consisting of the bners ff g g', the springactuated rods h h, the contact-points k, and the arms j, formed on the rods h and adapted to engage the contact-points la, substantially as described.

3. In an electromagnetic brake system, the combination of the dynamo-electric machine I, the magnets C, the auxiliary dynamo-electric machine J, the electric couplings formed of the bnffersff g g', the spring-actuated rods h h', contact-points k, arms j, formed' on the rods h, and the electric conductors, one of said dynamo-electric machines being carried on the locomotive, w-hile the other is carried and driven by one of the cars, substantially as dcscribed.

, JACOB HERRINGTON. Witnesses:

JOHN H. ELLIOTT, Jas. D. Pnsr. 

